Dearomatization of furans via [2,3]-Still–Wittig rearrangement
摘要:
Furans and benzofurans of type 1 were dearomatized via the [2,3]-Still-Wittig rearrangement. Enol ethers 2 could be isolated or isomerized to the corresponding furans 3. The substitution pattern at the homofuranylic position had a strong influence on reaction behaviour. Benzofurans rearranged with the greatest efficiency, and employment of a 3-substituted benzofuran (1; R'=CH3) allowed the creation of a quaternary carbon center. (C) 2004 Elsevier Ltd. All rights reserved.
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申请人:HAARMANN & REIMER GMBH
公开号:EP0459230B1
公开(公告)日:1994-08-31
Dearomatization of furans via [2,3]-Still–Wittig rearrangement
作者:Patrick A. Caruana、Alison J. Frontier
DOI:10.1016/j.tet.2004.09.029
日期:2004.11
Furans and benzofurans of type 1 were dearomatized via the [2,3]-Still-Wittig rearrangement. Enol ethers 2 could be isolated or isomerized to the corresponding furans 3. The substitution pattern at the homofuranylic position had a strong influence on reaction behaviour. Benzofurans rearranged with the greatest efficiency, and employment of a 3-substituted benzofuran (1; R'=CH3) allowed the creation of a quaternary carbon center. (C) 2004 Elsevier Ltd. All rights reserved.
Pratesi; Villa; Ferri, Farmaco, Edizione Scientifica, 1982, vol. 37, # 6, p. 398 - 410